Php Interview Questions And Answers Pdf
Top 25 PHP Interview Questions and Answers in PDF Format
Php Interview Questions And Answers Pdf
As a language used for scripting and developing web applications, PHP has gained immense popularity and demand in the technology industry. As a result, job opportunities for PHP developers have also increased, making it important for aspirants to prepare for PHP interviews. A PDF file containing commonly asked PHP interview questions and their answers can be a valuable resource for candidates to enhance their understanding and be well-prepared for interviews. These questions cover topics such as data types, functions, control structures, classes, databases, and more, providing a comprehensive overview of PHP concepts. By referring to the PDF, candidates can gain confidence and improve their chances of cracking a PHP interview.
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1 - What is PHP?
PHP (Hypertext Preprocessor) is an open source, server side scripting language used for creating dynamic websites and web applications.
2) What are the advantages of using PHP?
Some advantages of using PHP include its simplicity, cross platform compatibility, support for various databases, easy integration with HTML, and a large community for support.
3) What is a session in PHP?
A session in PHP is a way to store information (such as user data or preferences) temporarily on the server for use in multiple pages during a user's visit to a website.
4) What is the difference between a GET and POST method in PHP?
The GET method sends form data as part of the URL, while the POST method sends form data in a separate header. GET method is less secure, suitable for retrieving data, and has a limit on the amount of data that can be sent, while POST method is more secure, suitable for creating/updating data, and can send larger amounts of data.
5) How can you prevent SQL injections in PHP?
SQL injections can be prevented by using prepared statements, input validation, and escaping user inputs using functions like mysqli_real_escape_string() or PDO::quote().
6) Explain the difference between include() and require() functions in PHP.
Both include() and require() functions are used for including external files in PHP. While include() only gives a warning if the file is not found, require() throws a fatal error, halting the execution of the script.
7) How is inheritance achieved in PHP?
Inheritance in PHP is achieved by using the extends keyword, where a child class inherits properties and methods from a parent class.
8) What is the difference between == and === operators in PHP?
The == operator checks for equality between two values, while the === operator checks for both equality and type of the values.
9) What is a constructor in PHP?
A constructor in PHP is a special method used to initialize properties when an object is created. It is automatically called upon object creation.
10) How can you upload files in PHP?
Files can be uploaded in PHP using the $_FILES global variable. The process involves creating an HTML form with an input type="file" and then using the PHP move_uploaded_file() function to move the file from the temporary directory to a specified location.
11) What is the use of the global keyword in PHP?
The global keyword in PHP is used to access global variables from within a function or method. This allows us to modify or use global variables in a local scope.
12) How do you debug PHP code?
PHP code can be debugged using tools like Xdebug, which allows for step by step debugging and setting breakpoints in the code. Debugging can also be done using print statements or using the built in PHP function error_reporting().
13) What is the use of Laravel framework?
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Laravel is a popular PHP framework used for building web applications. It provides an elegant and expressive syntax, follows the MVC (Model View Controller) architectural pattern, and offers features like routing, authentication, and caching.
14) What is the purpose of the double arrow (=>) operator in PHP arrays?
The double arrow (=>) operator is used in PHP arrays to associate a key with its corresponding value. It is commonly used in associative arrays, where each key has a specific value associated with it.
15) How can you secure a PHP website?
Some ways to secure a PHP website include using HTTPS encryption, limiting file permissions, sanitizing user inputs, avoiding eval() and exec() functions, and keeping PHP and server software up to date to prevent known security vulnerabilities.
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